package com.whdc.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.nio.charset.Charset;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * @author lyf
 * @since 2025-06-25
 */
@Component
@Slf4j
public class SmsHelper {
    @Value("${sms.url}")
    private String url;
    @Value("${sms.userName}")
    private String userName;
    @Value("${sms.serviceCode}")
    private String serviceCode;
    @Value("${sms.userPassword}")
    private String userPassword;
    @Autowired
    private HttpHelper httpHelper;

    public String send(List<String> phones, String content) {
        return send(phones, content, "201");
    }

    private String send(List<String> phones, String content, String msgType) {
        if (phones == null || phones.size() == 0) {
            return "未选择手机号";
        }
        if (content == null || content.length() == 0) {
            return "短信内容为空";
        }

        String[] msgIds = new String[phones.size()];
        for (int i = 0; i < phones.size(); i++) {
            msgIds[i] = UUID.randomUUID().toString().replace("-", "");
        }
        String strPhones = String.join(",", phones);
        String strMsgIds = String.join(",", msgIds);
        String timestamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
        String sign = md5(userPassword + timestamp).toUpperCase();

        Map<String, Object> params = new HashMap<>();
        params.put("serviceCode", serviceCode);
        params.put("userName", userName);
        params.put("userPassword", userPassword);
        params.put("phones", strPhones);
        params.put("msgContent", encodeGBK(content));
        params.put("timestamp", timestamp);
        params.put("sign", sign);
        params.put("mhtMsgIds", strMsgIds);
        params.put("sendTime", "");
        params.put("priority", "5");
        params.put("orgCode", "42");
        params.put("msgType", msgType);
        params.put("reportFlag", "0");

        String strResult = httpHelper.postFormUrlEncoded(url, params, null, Charset.forName("GBK"));
        if (strResult == null) {
            return "发送失败";
        }

//        Map result = new ObjectMapper().readValue(strResult, Map.class);
        JSONObject result = JSON.parseObject(strResult);
        if (result == null) {
            return "发送结果解析失败";
        }
        int errorCode = (Integer) result.get("result");
        if (errorCode != 0) {
            return SmtpErrorCode.getErrorString(errorCode);
        }

        return "发送成功";
    }

    private String md5(String str) {
        MessageDigest m;
        try {
            m = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
        m.update(str.getBytes());
        byte[] s = m.digest();
        return parseByte2HexStr(s);
    }

    private static String encodeGBK(String content) {
        try {
            return URLDecoder.decode(content, "GBK");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }

    //将二进制数组转换成16进制字符串
    private String parseByte2HexStr(byte[] buf) {
        StringBuilder sb = new StringBuilder();
        for (byte b : buf) {
            String hex = Integer.toHexString(b & 0xFF);
            if (hex.length() == 1) {
                hex = '0' + hex;
            }
            sb.append(hex);
        }
        return sb.toString();
    }

    public static class SmtpErrorCode {
        private static Map<Integer, String> map;

        static {
            map = new HashMap<>();

            map.put(100, "非法登录，如登录名、口令出错、登录名与口令不符，md5 值不匹配等。");
            map.put(101, "连接过多，指单个商户要求同时建立的连接数过多。");
            map.put(102, "登陆类型错。");
            map.put(103, "协议版本号错");
            map.put(104, "ip 不合法，请联系管理员绑定 ip 后才可正常使用");
            map.put(105, "Smtp 的 tcp 协议只支持后付费类型");

            map.put(201, "非法手机号码。");
            map.put(202, "reportFlag 值不合法，值必须为 0 或 1");
            map.put(203, "信息长度错");
            map.put(204, "短信内容中有非法字符");
            map.put(205, "短信内容太长");
            map.put(206, "不存在的优先级");
            map.put(207, "SUBMIT 命令中的 serviceCode 不合法或者过期");
            map.put(208, "手机号和商户消息 id 个数不匹配");
            map.put(209, "orgCode 字段超过规定长度");
            map.put(210, "msgType 字段超过规定长度");
            map.put(211, "http 提交短信时的 url 不正确");
            map.put(212, "被代理的商户与代理商户之间的关系不合法");
            map.put(213, "暂未开通此商户通道，或者商户通道名称配置错误");
            map.put(214, "请求参数有误，比如传递了不在接口文档中定义的参数");
            map.put(215, "被代理的商户 id 不存在");
            map.put(216, "商户平台的消息 id 的长度超过最大长度");
            map.put(217, "sendTime 参数时间戳格式不正确");
            map.put(218, "商户服务代码与用户名密码不匹配");
            map.put(219, "接口只支持 HTTP POST 方式提交，而您的请求为 HTTP GET 方式");
            map.put(220, "批量提交一次最多只支持 50 个");
            map.put(221, "手机号不能为空");
            map.put(222, "短信内容含有乱码");

            map.put(500, "系统内部失败");

            map.put(900, "余额不足");
            map.put(901, "发送速度太快");
        }

        public static String getErrorString(int errorcode) {
            if (!map.containsKey(errorcode)) {
                return "errorcode:" + errorcode + "未定义";
            }

            return map.get(errorcode);
        }
    }

}